1940年,Lanford及Kiehl从偏釩酸銨制得了含有氨的多釩酸盐,溶解度很小,金黄色晶体。但是化学組成沒有測定。茲經复試,測得該化合物的組成含NH_3:V_2O_5:H_2O为2:3:1,也即是 In 1940, Lanford and Kiehl made ammonium metavanadate from ammonium metavanadate with little solubility and golden yellow crystals. However, the chemical composition has not been determined. By retesting, it was found that the composition of the compound contains NH 3: V 2 O 5: H 2 O of 2: 3: 1